Because of this difference, whereas the traditional bulbs can last up to 800 hours, halogen lights are able to work up to 1200 hours. In fact, even if some of the metal doesn’t evaporate, it settles back onto the filament, making the filament stronger and helping the bulb last longer. However, because the gas that fills halogen bulbs typically reaches higher temperatures compared to the traditional bulbs, the tungsten wire in halogen bulbs vaporizes entirely, leaving no residue. As traditional light bulbs work, the tungsten wire wears off and leaves black metal deposits inside the glass chamber.

The wire heats up and glows, slowly evaporating as the bulb shines away. Just like the good, old bulb, halogen light bulbs emit light as electrical power goes through a tungsten wire. While this number doesn’t make halogen bulbs the most eco-friendly option on the market, which is a title that goes to LED, it’s a big step up from the traditional bulbs. Unlike the traditional light bulbs, halogen bulbs spend far less energy – anywhere from 20 to 80% less. A lot of this energy is wasted, which is why the incandescent light bulbs banned in many parts of the world. If you’re familiar with traditional incandescent light bulbs, you know that they’re not very energy-efficient, spending 60 watts and upwards, with some stronger household-use bulbs using 100 watts. These little bulbs were invented in the 1960s, and they remain the top choice for headlight bulbs across the world because of their compact size and low production cost.

Halogen headlights are rather simple bulbs, so it’s not hard to understand how they work.

Hid 9007 bixen vs halogen